Burner for synthesis gas

Abstract

The present invention relates to a burner, substantially comprising a swirl generator for a combustion air stream and means for introducing fuel into the combustion air stream, the swirl generator having combustion-air inlet openings for the combustion air stream that enters the burner, and the means for introducing fuel into the combustion air stream comprising one or more first fuel feeds having a group of first fuel outlet openings, arranged distributed around the burner axis at a combustion chamber-side end of the burner. The burner is distinguished by the fact that the one or more first fuel feeds having the group of first fuel outlet openings are mechanically decoupled from the swirl generator. The present burner allows reliable and safe use of synthesis gas in both dilute and undiluted form as fuel.

1. A burner comprising a swirl generator unit and means for introducing fuel into a combustion air stream,
 the swirl generator unit comprising a swirl generator having at least one combustion-air inlet opening for the combustion air stream, and surrounding an internal swirl space, and 
 the means for introducing fuel comprising at least one first fuel feed having a group of first fuel outlet openings arranged radially outside the swirl generator unit proximate an exit of the swirl space, 
 wherein the swirl generator unit, at a combustion chamber-side end, has at least one inlet opening that at least partially surrounds periphery of the swirl generator unit, and 
 wherein the fuel outlet openings in the region of the inlet opening are arranged radially outside the swirl generator unit so that fuel communicates with the internal swirl space through the inlet opening. 
 
     
     
       2. The burner of  claim 1 , wherein the group of first fuel outlet openings is arranged in a row around a burner axis. 
     
     
       3. The burner of  claim 1 , wherein outlet passages formed by the first fuel outlet openings are disposed along passage axes and are arranged at an angle such that the passage axes intersect at a point on a burner axis downstream of the burner. 
     
     
       4. The burner of  claim 1 , wherein outlet passages formed by the first fuel outlet openings are disposed along passage axes and are arranged at angles with respect to a burner axis such that the passage axes of different subgroups of the first fuel outlet openings intersect at various points downstream of the burner. 
     
     
       5. The burner of  claim 1 , wherein the swirl generator and the at least one first fuel feed are formed of the same material and are coupled together. 
     
     
       6. The burner of  claim 1 , wherein the fuel feeds are connected to the swirl generator unit via connecting lugs. 
     
     
       7. The burner of  claim 6 , wherein the fuel feeds are connected to the swirl generator unit only at the combustion chamber-side end of the swirl generator unit. 
     
     
       8. The burner of  claim 1 , wherein a fuel lance projects from a side of the swirl generator unit that is remote from the combustion chamber toward the internal swirl space and is arranged on a burner axis. 
     
     
       9. The burner of  claim 1 , wherein at least one second fuel feed having a group of second fuel outlet openings is arranged substantially along a direction of a burner axis, and is provided at the swirl generator. 
     
     
       10. The burner of  claim 9 , wherein the at least one first fuel feed is configured with a cross-section permitting volumetric flow to be several times higher than in the at least one second fuel feed. 
     
     
       11. The burner of  claim 9 , wherein an inner body is arranged in an internal volume of the burner, the second fuel outlet openings of at least one second fuel feed being arranged on the inner body substantially along a direction of a burner axis. 
     
     
       12. The burner of  claim 1 , wherein the at least one combustion-air inlet opening comprises tangential inlet slots. 
     
     
       13. The burner of  claim 1 , wherein the at least one combustion-air inlet opening comprises tangential inlet slots disposed substantially in the direction of a burner axis. 
     
     
       14. The burner of  claim 13 , wherein a second fuel feed having a group of second fuel outlet openings is arranged along each inlet slot. 
     
     
       15. The burner of  claim 1 , wherein the at least one inlet opening comprises a slot. 
     
     
       16. The burner of  claim 1 , wherein the swirl generator and the at least one first fuel feed are castings of the same material and are coupled together. 
     
     
       17. A gas turbine comprising:
 at least one burner comprising a swirl generator unit and means for introducing fuel into a combustion air stream, 
 the swirl generator unit comprising a swirl generator having at least one combustion-air inlet opening for the combustion air stream, and surrounding an internal swirl space, and 
 the means for introducing fuel comprising at least one first fuel feed having a group of first fuel outlet openings arranged radially outside the swirl generator unit proximate an exit of the swirl space, 
 wherein the swirl generator unit, at a combustion chamber-side end, has at least one inlet opening that at least partially surrounds periphery of the swirl generator unit, and 
 wherein the fuel outlet openings in the region of the inlet opening are arranged radially outside the swirl generator unit so that fuel communicates with the internal swirl space through the inlet opening. 
 
     
     
       18. The burner of  claim 17 , wherein the swirl space is conical. 
     
     
       19. The burner of  claim 1 , wherein the swirl space is conical.